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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.33 by root, Mon Aug 22 23:21:57 2005 UTC vs.
Revision 1.127 by root, Tue Sep 30 13:17:32 2008 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"
9
10	#include <pthread.h>	9	#include <stddef.h>
11		10	#include <stdlib.h>
		11	#include <errno.h>
12	#include <sys/types.h>	12	#include <sys/types.h>
13	#include <sys/stat.h>	13	#include <sys/stat.h>
14
15	#include <unistd.h>	14	#include <limits.h>
16	#include <fcntl.h>	15	#include <fcntl.h>
17	#include <signal.h>
18	#include <sched.h>	16	#include <sched.h>
19		17
20	#if HAVE_SENDFILE	18	/* perl namespace pollution */
21	# if __linux	19	#undef VERSION
22	# include <sys/sendfile.h>	20
23	# elif __freebsd	21	#ifdef _WIN32
24	# include <sys/socket.h>	22
		23	# define EIO_STRUCT_DIRENT Direntry_t
		24	# undef malloc
		25	# undef free
		26
		27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
		59	#else
		60
25	# include <sys/uio.h>	61	# include <sys/time.h>
26	# elif __hpux
27	# include <sys/socket.h>	62	# include <sys/select.h>
28	# endif	63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
29	#endif	68	#endif
30		69
31	#if __ia64	70	/* perl stupidly overrides readdir and maybe others */
32	# define STACKSIZE 65536	71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
33	#else	81	#else
34	# define STACKSIZE 4096	82	# define SvVAL64 SvNV
35	#endif	83	#endif
36		84
		85	/*****************************************************************************/
		86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
		91	#endif
		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	static HV *stash;
		99	typedef SV SV8; /* byte-sv, used for argument-checking */
		100
		101	#define AIO_REQ_KLASS "IO::AIO::REQ"
		102	#define AIO_GRP_KLASS "IO::AIO::GRP"
		103
		104	#define EIO_REQ_MEMBERS \
		105	SV *callback; \
		106	SV *sv1, *sv2; \
		107	STRLEN stroffset; \
		108	SV *self;
		109
		110	#define EIO_NO_WRAPPERS 1
		111
		112	#include "libeio/eio.h"
		113
		114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void aio_grp_feed (eio_req *grp);
		117	#define EIO_FEED(req) aio_grp_feed (req)
		118	static void req_destroy (eio_req *grp);
		119	#define EIO_DESTROY(req) req_destroy (req)
		120
37	enum {	121	enum {
38	REQ_QUIT,	122	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
39	REQ_OPEN, REQ_CLOSE,
40	REQ_READ, REQ_WRITE, REQ_READAHEAD,
41	REQ_SENDFILE,
42	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
43	REQ_FSYNC, REQ_FDATASYNC,
44	REQ_UNLINK, REQ_RMDIR,
45	REQ_SYMLINK,
46	};	123	};
47		124
48	typedef struct aio_cb {	125	#include "libeio/eio.c"
49	struct aio_cb *volatile next;
50		126
51	int type;
52
53	int fd, fd2;
54	off_t offset;
55	size_t length;
56	ssize_t result;
57	mode_t mode; /* open */
58	int errorno;
59	SV *data, *callback;
60	SV *fh, *fh2;
61	void *dataptr, *data2ptr;
62	STRLEN dataoffset;
63
64	Stat_t *statdata;
65	} aio_cb;
66
67	typedef aio_cb *aio_req;	127	typedef eio_req *aio_req;
		128	typedef eio_req *aio_req_ornot;
68		129
69	static int started, wanted;	130	static SV *on_next_submit;
70	static volatile int nreqs;	131	static int next_pri = EIO_PRI_DEFAULT;
71	static int max_outstanding = 1<<30;	132	static int max_outstanding;
72	static int respipe [2];
73		133
74	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	134	static int respipe_osf [2], respipe [2] = { -1, -1 };
75	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
76	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77		135
78	static volatile aio_req reqs, reqe; /* queue start, queue end */	136	static void req_destroy (aio_req req);
79	static volatile aio_req ress, rese; /* queue start, queue end */
80
81	static void free_req (aio_req req)	137	static void req_cancel (aio_req req);
82	{
83	if (req->data)
84	SvREFCNT_dec (req->data);
85		138
		139	static void want_poll (void)
		140	{
		141	/* write a dummy byte to the pipe so fh becomes ready */
		142	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		143	}
		144
		145	static void done_poll (void)
		146	{
		147	/* read any signals sent by the worker threads */
		148	char buf [4];
		149	while (respipe_read (respipe [0], buf, 4) == 4)
		150	;
		151	}
		152
		153	/* must be called at most once */
		154	static SV *req_sv (aio_req req, const char *klass)
		155	{
		156	if (!req->self)
		157	{
		158	req->self = (SV *)newHV ();
		159	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		160	}
		161
		162	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		163	}
		164
		165	static aio_req SvAIO_REQ (SV *sv)
		166	{
		167	MAGIC *mg;
		168
		169	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		170	croak ("object of class " AIO_REQ_KLASS " expected");
		171
		172	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		173
		174	return mg ? (aio_req)mg->mg_ptr : 0;
		175	}
		176
		177	static void aio_grp_feed (aio_req grp)
		178	{
		179	if (grp->sv2 && SvOK (grp->sv2))
		180	{
		181	dSP;
		182
		183	ENTER;
		184	SAVETMPS;
		185	PUSHMARK (SP);
		186	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		187	PUTBACK;
		188	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		189	SPAGAIN;
		190	FREETMPS;
		191	LEAVE;
		192	}
		193	}
		194
		195	static void req_submit (eio_req *req)
		196	{
		197	eio_submit (req);
		198
		199	if (expect_false (on_next_submit))
		200	{
		201	dSP;
		202	SV *cb = sv_2mortal (on_next_submit);
		203
		204	on_next_submit = 0;
		205
		206	PUSHMARK (SP);
		207	PUTBACK;
		208	call_sv (cb, G_DISCARD | G_EVAL);
		209	}
		210	}
		211
		212	static int req_invoke (eio_req *req)
		213	{
		214	dSP;
		215
		216	if (req->flags & FLAG_SV2_RO_OFF)
		217	SvREADONLY_off (req->sv2);
		218
		219	if (!EIO_CANCELLED (req) && SvOK (req->callback))
		220	{
		221	ENTER;
		222	SAVETMPS;
		223	PUSHMARK (SP);
		224	EXTEND (SP, 1);
		225
		226	switch (req->type)
		227	{
		228	case EIO_READDIR:
		229	{
		230	SV *rv = &PL_sv_undef;
		231
		232	if (req->result >= 0)
		233	{
		234	int i;
		235	char *buf = req->ptr2;
		236	AV *av = newAV ();
		237
		238	av_extend (av, req->result - 1);
		239
		240	for (i = 0; i < req->result; ++i)
		241	{
		242	SV *sv = newSVpv (buf, 0);
		243
		244	av_store (av, i, sv);
		245	buf += SvCUR (sv) + 1;
		246	}
		247
		248	rv = sv_2mortal (newRV_noinc ((SV *)av));
		249	}
		250
		251	PUSHs (rv);
		252	}
		253	break;
		254
		255	case EIO_OPEN:
		256	{
		257	/* convert fd to fh */
		258	SV *fh = &PL_sv_undef;
		259
		260	if (req->result >= 0)
		261	{
		262	GV *gv = (GV *)sv_newmortal ();
		263	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		264	char sym [64];
		265	int symlen;
		266
		267	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		268	gv_init (gv, stash, sym, symlen, 0);
		269
		270	symlen = snprintf (
		271	sym,
		272	sizeof (sym),
		273	"%s&=%d",
		274	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		275	req->result
		276	);
		277
		278	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		279	fh = (SV *)gv;
		280	}
		281
		282	PUSHs (fh);
		283	}
		284	break;
		285
		286	case EIO_GROUP:
		287	req->int1 = 2; /* mark group as finished */
		288
		289	if (req->sv1)
		290	{
		291	int i;
		292	AV *av = (AV *)req->sv1;
		293
		294	EXTEND (SP, AvFILL (av) + 1);
		295	for (i = 0; i <= AvFILL (av); ++i)
		296	PUSHs (*av_fetch (av, i, 0));
		297	}
		298	break;
		299
		300	case EIO_NOP:
		301	case EIO_BUSY:
		302	break;
		303
		304	case EIO_READLINK:
		305	if (req->result > 0)
		306	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		307	break;
		308
		309	case EIO_STAT:
		310	case EIO_LSTAT:
		311	case EIO_FSTAT:
		312	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		313	PL_laststatval = req->result;
		314	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		315	PUSHs (sv_2mortal (newSViv (req->result)));
		316	break;
		317
		318	case EIO_READ:
		319	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		320	*SvEND (req->sv2) = 0;
		321	PUSHs (sv_2mortal (newSViv (req->result)));
		322	break;
		323
		324	case EIO_DUP2:
		325	if (req->result > 0)
		326	req->result = 0;
		327	/* FALLTHROUGH */
		328
		329	default:
		330	PUSHs (sv_2mortal (newSViv (req->result)));
		331	break;
		332	}
		333
		334	errno = req->errorno;
		335
		336	PUTBACK;
		337	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		338	SPAGAIN;
		339
		340	FREETMPS;
		341	LEAVE;
		342
		343	PUTBACK;
		344	}
		345
		346	return !!SvTRUE (ERRSV);
		347	}
		348
		349	static void req_destroy (aio_req req)
		350	{
86	if (req->fh)	351	if (req->self)
		352	{
		353	sv_unmagic (req->self, PERL_MAGIC_ext);
87	SvREFCNT_dec (req->fh);	354	SvREFCNT_dec (req->self);
		355	}
88		356
89	if (req->fh2)	357	SvREFCNT_dec (req->sv1);
90	SvREFCNT_dec (req->fh2);	358	SvREFCNT_dec (req->sv2);
91
92	if (req->statdata)
93	Safefree (req->statdata);
94
95	if (req->callback)
96	SvREFCNT_dec (req->callback);	359	SvREFCNT_dec (req->callback);
97		360
98	Safefree (req);	361	Safefree (req);
99	}	362	}
100		363
		364	static void req_cancel_subs (aio_req grp)
		365	{
		366	aio_req sub;
		367
		368	if (grp->type != EIO_GROUP)
		369	return;
		370
		371	SvREFCNT_dec (grp->sv2);
		372	grp->sv2 = 0;
		373
		374	eio_grp_cancel (grp);
		375	}
		376
		377	#ifdef USE_SOCKETS_AS_HANDLES
		378	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		379	#else
		380	# define TO_SOCKET(x) (x)
		381	#endif
		382
101	static void	383	static void
102	poll_wait ()	384	create_respipe (void)
103	{	385	{
104	if (nreqs && !ress)	386	int old_readfd = respipe [0];
		387
		388	if (respipe [1] >= 0)
		389	respipe_close (TO_SOCKET (respipe [1]));
		390
		391	#ifdef _WIN32
		392	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		393	#else
		394	if (pipe (respipe))
		395	#endif
		396	croak ("unable to initialize result pipe");
		397
		398	if (old_readfd >= 0)
105	{	399	{
106	fd_set rfd;	400	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
107	FD_ZERO(&rfd);	401	croak ("unable to initialize result pipe(2)");
108	FD_SET(respipe [0], &rfd);
109		402
110	select (respipe [0] + 1, &rfd, 0, 0, 0);	403	respipe_close (respipe [0]);
		404	respipe [0] = old_readfd;
111	}	405	}
112	}
113		406
114	static int	407	#ifdef _WIN32
115	poll_cb ()	408	int arg = 1;
116	{	409	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
117	dSP;	410	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
118	int count = 0;	411	#else
119	int do_croak = 0;	412	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
120	aio_req req;	413	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		414	#endif
		415	croak ("unable to initialize result pipe(3)");
121		416
		417	respipe_osf [0] = TO_SOCKET (respipe [0]);
		418	respipe_osf [1] = TO_SOCKET (respipe [1]);
		419	}
		420
		421	static void poll_wait (void)
		422	{
		423	fd_set rfd;
		424
		425	while (eio_nreqs ())
		426	{
		427	int size;
		428
		429	X_LOCK (reslock);
		430	size = res_queue.size;
		431	X_UNLOCK (reslock);
		432
		433	if (size)
		434	return;
		435
		436	etp_maybe_start_thread ();
		437
		438	FD_ZERO (&rfd);
		439	FD_SET (respipe [0], &rfd);
		440
		441	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		442	}
		443	}
		444
		445	static int poll_cb (void)
		446	{
122	for (;;)	447	for (;;)
123	{	448	{
124	pthread_mutex_lock (&reslock);	449	int res = eio_poll ();
125	req = ress;
126		450
127	if (req)	451	if (res > 0)
128	{
129	ress = req->next;
130
131	if (!ress)
132	{
133	/* read any signals sent by the worker threads */
134	char buf [32];
135	while (read (respipe [0], buf, 32) == 32)
136	;
137
138	rese = 0;
139	}
140	}
141
142	pthread_mutex_unlock (&reslock);
143
144	if (!req)
145	break;
146
147	nreqs--;
148
149	if (req->type == REQ_QUIT)
150	started--;
151	else
152	{
153	int errorno = errno;
154	errno = req->errorno;
155
156	if (req->type == REQ_READ)
157	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158
159	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160	SvREADONLY_off (req->data);
161
162	if (req->statdata)
163	{
164	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165	PL_laststatval = req->result;
166	PL_statcache = *(req->statdata);
167	}
168
169	ENTER;
170	PUSHMARK (SP);
171	XPUSHs (sv_2mortal (newSViv (req->result)));
172
173	if (req->type == REQ_OPEN)
174	{
175	/* convert fd to fh */
176	SV *fh;
177
178	PUTBACK;
179	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
180	SPAGAIN;
181
182	fh = SvREFCNT_inc (POPs);
183
184	PUSHMARK (SP);
185	XPUSHs (sv_2mortal (fh));
186	}
187
188	if (SvOK (req->callback))
189	{
190	PUTBACK;
191	call_sv (req->callback, G_VOID | G_EVAL);
192	SPAGAIN;
193
194	if (SvTRUE (ERRSV))
195	{
196	free_req (req);
197	croak (0);	452	croak (0);
198	}
199	}
200		453
201	LEAVE;	454	if (!max_outstanding || max_outstanding > eio_nreqs ())
		455	return res;
202		456
203	errno = errorno;	457	poll_wait ();
204	count++;
205	}
206
207	free_req (req);
208	}	458	}
209
210	return count;
211	}
212
213	static void *aio_proc(void *arg);
214
215	static void
216	start_thread (void)
217	{
218	sigset_t fullsigset, oldsigset;
219	pthread_t tid;
220	pthread_attr_t attr;
221
222	pthread_attr_init (&attr);
223	pthread_attr_setstacksize (&attr, STACKSIZE);
224	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
225
226	sigfillset (&fullsigset);
227	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
228
229	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
230	started++;
231
232	sigprocmask (SIG_SETMASK, &oldsigset, 0);
233	}
234
235	static void
236	send_req (aio_req req)
237	{
238	while (started < wanted && nreqs >= started)
239	start_thread ();
240
241	nreqs++;
242
243	pthread_mutex_lock (&reqlock);
244
245	req->next = 0;
246
247	if (reqe)
248	{
249	reqe->next = req;
250	reqe = req;
251	}
252	else
253	reqe = reqs = req;
254
255	pthread_cond_signal (&reqwait);
256	pthread_mutex_unlock (&reqlock);
257
258	if (nreqs > max_outstanding)
259	for (;;)
260	{
261	poll_cb ();
262
263	if (nreqs <= max_outstanding)
264	break;
265
266	poll_wait ();
267	}
268	}
269
270	static void
271	end_thread (void)
272	{
273	aio_req req;
274	Newz (0, req, 1, aio_cb);
275	req->type = REQ_QUIT;
276
277	send_req (req);
278	}
279
280	static void min_parallel (int nthreads)
281	{
282	if (wanted < nthreads)
283	wanted = nthreads;
284	}
285
286	static void max_parallel (int nthreads)
287	{
288	int cur = started;
289
290	if (wanted > nthreads)
291	wanted = nthreads;
292
293	while (cur > wanted)
294	{
295	end_thread ();
296	cur--;
297	}
298
299	while (started > wanted)
300	{
301	poll_wait ();
302	poll_cb ();
303	}
304	}
305
306	static void create_pipe ()
307	{
308	if (pipe (respipe))
309	croak ("unable to initialize result pipe");
310
311	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312	croak ("cannot set result pipe to nonblocking mode");
313
314	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315	croak ("cannot set result pipe to nonblocking mode");
316	}
317
318	static void atfork_prepare (void)
319	{
320	pthread_mutex_lock (&reqlock);
321	pthread_mutex_lock (&reslock);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}	459	}
329		460
330	static void atfork_child (void)	461	static void atfork_child (void)
331	{	462	{
332	aio_req prv;
333
334	started = 0;
335
336	while (reqs)
337	{
338	prv = reqs;
339	reqs = prv->next;
340	free_req (prv);
341	}
342
343	reqs = reqe = 0;
344
345	while (ress)
346	{
347	prv = ress;
348	ress = prv->next;
349	free_req (prv);
350	}
351
352	ress = rese = 0;
353
354	close (respipe [0]);
355	close (respipe [1]);
356	create_pipe ();	463	create_respipe ();
357
358	atfork_parent ();
359	}
360
361	/*****************************************************************************/
362	/* work around various missing functions */
363
364	#if !HAVE_PREADWRITE
365	# define pread aio_pread
366	# define pwrite aio_pwrite
367
368	/*
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
374
375	static ssize_t
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{
378	ssize_t res;
379	off_t ooffset;
380
381	pthread_mutex_lock (&iolock);
382	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&iolock);
387
388	return res;
389	}
390
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396
397	pthread_mutex_lock (&iolock);
398	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&iolock);
403
404	return res;
405	}
406	#endif
407
408	#if !HAVE_FDATASYNC
409	# define fdatasync fsync
410	#endif
411
412	#if !HAVE_READAHEAD
413	# define readahead aio_readahead
414
415	static char readahead_buf[4096];
416
417	static ssize_t
418	readahead (int fd, off_t offset, size_t count)
419	{
420	while (count > 0)
421	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}
431	#endif
432
433	/* sendfile always needs emulation */
434	static ssize_t
435	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
436	{
437	ssize_t res;
438
439	if (!count)
440	return 0;
441
442	#if __linux
443	res = sendfile (ofd, ifd, &offset, count);
444
445	#elif __freebsd
446	/*
447	* Of course, the freebsd sendfile is a dire hack with no thoughts
448	* wasted on making it similar to other i/o functions.
449	*/
450	{
451	off_t sbytes;
452	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453
454	if (!res && errno == EAGAIN)
455	/* maybe on others, too, as usual, the manpage leaves you guessing */
456	res = sbytes;
457	}
458
459	#elif __hpux
460	res = sendfile (ofd, ifd, offset, count, 0, 0);
461
462	#else
463	res = -1;
464	errno = ENOSYS;
465	#endif
466
467	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))
468	{
469	/* emulate sendfile. this is a major pain in the ass */
470	char *buf = malloc (4096);
471	res = 0;
472
473	for (;;)
474	{
475	ssize_t cnt;
476
477	cnt = pread (ifd, buf, 4096, offset);
478
479	if (cnt <= 0)
480	{
481	if (cnt && !res) res = -1;
482	break;
483	}
484
485	cnt = write (ofd, buf, cnt);
486
487	if (cnt <= 0)
488	{
489	if (cnt && !res) res = -1;
490	break;
491	}
492
493	offset += cnt;
494	res += cnt;
495	}
496
497	{
498	int errorno = errno;
499	free (buf);
500	errno = errorno;
501	}
502	}
503
504	return res;
505	}
506
507	/*****************************************************************************/
508
509	static void *
510	aio_proc (void *thr_arg)
511	{
512	aio_req req;
513	int type;
514
515	do
516	{
517	pthread_mutex_lock (&reqlock);
518
519	for (;;)
520	{
521	req = reqs;
522
523	if (reqs)
524	{
525	reqs = reqs->next;
526	if (!reqs) reqe = 0;
527	}
528
529	if (req)
530	break;
531
532	pthread_cond_wait (&reqwait, &reqlock);
533	}
534
535	pthread_mutex_unlock (&reqlock);
536
537	errno = 0; /* strictly unnecessary */
538
539	type = req->type;
540
541	switch (type)
542	{
543	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
544	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
545
546	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
547	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
548
549	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
550	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
551	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
552
553	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
554	case REQ_CLOSE: req->result = close (req->fd); break;
555	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
556	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
557	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
558
559	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
560	case REQ_FSYNC: req->result = fsync (req->fd); break;
561
562	case REQ_QUIT:
563	break;
564
565	default:
566	req->result = ENOSYS;
567	break;
568	}
569
570	req->errorno = errno;
571
572	pthread_mutex_lock (&reslock);
573
574	req->next = 0;
575
576	if (rese)
577	{
578	rese->next = req;
579	rese = req;
580	}
581	else
582	{
583	rese = ress = req;
584
585	/* write a dummy byte to the pipe so fh becomes ready */
586	write (respipe [1], &respipe, 1);
587	}
588
589	pthread_mutex_unlock (&reslock);
590	}
591	while (type != REQ_QUIT);
592
593	return 0;
594	}	464	}
595		465
596	#define dREQ \	466	#define dREQ \
597	aio_req req; \	467	aio_req req; \
		468	int req_pri = next_pri; \
		469	next_pri = EIO_PRI_DEFAULT; \
598	\	470	\
599	if (SvOK (callback) && !SvROK (callback)) \	471	if (SvOK (callback) && !SvROK (callback)) \
600	croak ("clalback must be undef or of reference type"); \	472	croak ("callback must be undef or of reference type"); \
601	\	473	\
602	Newz (0, req, 1, aio_cb); \	474	Newz (0, req, 1, eio_req); \
603	if (!req) \	475	if (!req) \
604	croak ("out of memory during aio_req allocation"); \	476	croak ("out of memory during eio_req allocation"); \
605	\	477	\
606	req->callback = newSVsv (callback);	478	req->callback = newSVsv (callback); \
		479	req->pri = req_pri
		480
		481	#define REQ_SEND \
		482	PUTBACK; \
		483	req_submit (req); \
		484	SPAGAIN; \
		485	\
		486	if (GIMME_V != G_VOID) \
		487	XPUSHs (req_sv (req, AIO_REQ_KLASS));
607		488
608	MODULE = IO::AIO PACKAGE = IO::AIO	489	MODULE = IO::AIO PACKAGE = IO::AIO
609		490
610	PROTOTYPES: ENABLE	491	PROTOTYPES: ENABLE
611		492
612	BOOT:	493	BOOT:
613	{	494	{
614	create_pipe ();	495	stash = gv_stashpv ("IO::AIO", 1);
615	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
616	}
617		496
		497	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		498	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		499	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		500	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		501	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		502	#ifndef _WIN32
		503	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		504	#endif
		505
		506	create_respipe ();
		507
		508	if (eio_init (want_poll, done_poll) < 0)
		509	croak ("IO::AIO: unable to initialise eio library");
		510
		511	/* atfork child called in fifo order, so before eio's handler */
		512	X_THREAD_ATFORK (0, 0, atfork_child);
		513	}
		514
618	void	515	void
619	min_parallel(nthreads)	516	max_poll_reqs (int nreqs)
620	int nthreads
621	PROTOTYPE: $	517	PROTOTYPE: $
		518	CODE:
		519	eio_set_max_poll_reqs (nreqs);
622		520
623	void	521	void
624	max_parallel(nthreads)	522	max_poll_time (double nseconds)
625	int nthreads
626	PROTOTYPE: $	523	PROTOTYPE: $
627
628	int
629	max_outstanding(nreqs)
630	int nreqs
631	PROTOTYPE: $
632	CODE:	524	CODE:
633	RETVAL = max_outstanding;	525	eio_set_max_poll_time (nseconds);
		526
		527	void
		528	min_parallel (int nthreads)
		529	PROTOTYPE: $
		530	CODE:
		531	eio_set_min_parallel (nthreads);
		532
		533	void
		534	max_parallel (int nthreads)
		535	PROTOTYPE: $
		536	CODE:
		537	eio_set_max_parallel (nthreads);
		538
		539	void
		540	max_idle (int nthreads)
		541	PROTOTYPE: $
		542	CODE:
		543	eio_set_max_idle (nthreads);
		544
		545	void
		546	max_outstanding (int maxreqs)
		547	PROTOTYPE: $
		548	CODE:
634	max_outstanding = nreqs;	549	max_outstanding = maxreqs;
635		550
636	void	551	void
637	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	552	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
638	SV * pathname
639	int flags
640	int mode
641	SV * callback
642	PROTOTYPE: $$$;$	553	PROTOTYPE: $$$;$
643	CODE:	554	PPCODE:
644	{	555	{
645	dREQ;	556	dREQ;
646		557
647	req->type = REQ_OPEN;	558	req->type = EIO_OPEN;
648	req->data = newSVsv (pathname);	559	req->sv1 = newSVsv (pathname);
649	req->dataptr = SvPVbyte_nolen (req->data);	560	req->ptr1 = SvPVbyte_nolen (req->sv1);
650	req->fd = flags;	561	req->int1 = flags;
651	req->mode = mode;	562	req->int2 = mode;
652		563
653	send_req (req);	564	REQ_SEND;
654	}	565	}
655		566
656	void	567	void
657	aio_close(fh,callback=&PL_sv_undef)	568	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
658	SV * fh
659	SV * callback
660	PROTOTYPE: $;$	569	PROTOTYPE: $;$
661	ALIAS:	570	ALIAS:
662	aio_close = REQ_CLOSE
663	aio_fsync = REQ_FSYNC	571	aio_fsync = EIO_FSYNC
664	aio_fdatasync = REQ_FDATASYNC	572	aio_fdatasync = EIO_FDATASYNC
665	CODE:	573	PPCODE:
666	{	574	{
667	dREQ;	575	dREQ;
668		576
669	req->type = ix;	577	req->type = ix;
670	req->fh = newSVsv (fh);	578	req->sv1 = newSVsv (fh);
671	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	579	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
672		580
673	send_req (req);	581	REQ_SEND (req);
674	}	582	}
675		583
676	void	584	void
		585	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		586	PROTOTYPE: $;$
		587	PPCODE:
		588	{
		589	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		590	dREQ;
		591
		592	if (close_pipe < 0)
		593	{
		594	int pipefd [2];
		595
		596	if (pipe (pipefd) < 0
		597	|| close (pipefd [1]) < 0
		598	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		599	abort (); /*D*/
		600
		601	close_pipe = pipefd [0];
		602	}
		603
		604	req->type = EIO_DUP2;
		605	req->int1 = close_pipe;
		606	req->sv2 = newSVsv (fh);
		607	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		608
		609	REQ_SEND (req);
		610	}
		611
		612	void
677	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	613	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
678	SV * fh
679	UV offset
680	UV length
681	SV * data
682	UV dataoffset
683	SV * callback
684	ALIAS:	614	ALIAS:
685	aio_read = REQ_READ	615	aio_read = EIO_READ
686	aio_write = REQ_WRITE	616	aio_write = EIO_WRITE
687	PROTOTYPE: $$$$$;$	617	PROTOTYPE: $$$$$;$
688	CODE:	618	PPCODE:
689	{	619	{
690	aio_req req;
691	STRLEN svlen;	620	STRLEN svlen;
692	char *svptr = SvPVbyte (data, svlen);	621	char *svptr = SvPVbyte (data, svlen);
		622	UV len = SvUV (length);
693		623
694	SvUPGRADE (data, SVt_PV);	624	SvUPGRADE (data, SVt_PV);
695	SvPOK_on (data);	625	SvPOK_on (data);
696		626
697	if (dataoffset < 0)	627	if (dataoffset < 0)
698	dataoffset += svlen;	628	dataoffset += svlen;
699		629
700	if (dataoffset < 0 || dataoffset > svlen)	630	if (dataoffset < 0 || dataoffset > svlen)
701	croak ("data offset outside of string");	631	croak ("dataoffset outside of data scalar");
702		632
703	if (ix == REQ_WRITE)	633	if (ix == EIO_WRITE)
704	{	634	{
705	/* write: check length and adjust. */	635	/* write: check length and adjust. */
706	if (length < 0 || length + dataoffset > svlen)	636	if (!SvOK (length) || len + dataoffset > svlen)
707	length = svlen - dataoffset;	637	len = svlen - dataoffset;
708	}	638	}
709	else	639	else
710	{	640	{
711	/* read: grow scalar as necessary */	641	/* read: grow scalar as necessary */
712	svptr = SvGROW (data, length + dataoffset);	642	svptr = SvGROW (data, len + dataoffset + 1);
713	}	643	}
714		644
715	if (length < 0)	645	if (len < 0)
716	croak ("length must not be negative");	646	croak ("length must not be negative");
717		647
718	{	648	{
719	dREQ;	649	dREQ;
720		650
721	req->type = ix;	651	req->type = ix;
722	req->fh = newSVsv (fh);	652	req->sv1 = newSVsv (fh);
723	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	653	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
724	: IoOFP (sv_2io (fh)));	654	: IoOFP (sv_2io (fh)));
		655	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
725	req->offset = offset;	656	req->size = len;
726	req->length = length;
727	req->data = SvREFCNT_inc (data);	657	req->sv2 = SvREFCNT_inc (data);
728	req->dataptr = (char *)svptr + dataoffset;	658	req->ptr2 = (char *)svptr + dataoffset;
		659	req->stroffset = dataoffset;
729		660
730	if (!SvREADONLY (data))	661	if (!SvREADONLY (data))
731	{	662	{
732	SvREADONLY_on (data);	663	SvREADONLY_on (data);
733	req->data2ptr = (void *)data;	664	req->flags |= FLAG_SV2_RO_OFF;
734	}	665	}
735		666
736	send_req (req);	667	REQ_SEND;
737	}	668	}
738	}	669	}
739		670
740	void	671	void
		672	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		673	PROTOTYPE: $$;$
		674	PPCODE:
		675	{
		676	SV *data;
		677	dREQ;
		678
		679	req->type = EIO_READLINK;
		680	req->sv1 = newSVsv (path);
		681	req->ptr1 = SvPVbyte_nolen (req->sv1);
		682
		683	REQ_SEND;
		684	}
		685
		686	void
741	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	687	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
742	SV * out_fh
743	SV * in_fh
744	UV in_offset
745	UV length
746	SV * callback
747	PROTOTYPE: $$$$;$	688	PROTOTYPE: $$$$;$
748	CODE:	689	PPCODE:
749	{	690	{
750	dREQ;	691	dREQ;
751		692
752	req->type = REQ_SENDFILE;	693	req->type = EIO_SENDFILE;
753	req->fh = newSVsv (out_fh);	694	req->sv1 = newSVsv (out_fh);
754	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	695	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
755	req->fh2 = newSVsv (in_fh);	696	req->sv2 = newSVsv (in_fh);
756	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	697	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
757	req->offset = in_offset;	698	req->offs = SvVAL64 (in_offset);
758	req->length = length;	699	req->size = length;
759		700
760	send_req (req);	701	REQ_SEND;
761	}	702	}
762		703
763	void	704	void
764	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	705	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
765	SV * fh
766	UV offset
767	IV length
768	SV * callback
769	PROTOTYPE: $$$;$	706	PROTOTYPE: $$$;$
770	CODE:	707	PPCODE:
771	{	708	{
772	dREQ;	709	dREQ;
773		710
774	req->type = REQ_READAHEAD;	711	req->type = EIO_READAHEAD;
775	req->fh = newSVsv (fh);	712	req->sv1 = newSVsv (fh);
776	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	713	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
777	req->offset = offset;	714	req->offs = SvVAL64 (offset);
778	req->length = length;	715	req->size = length;
779		716
780	send_req (req);	717	REQ_SEND;
781	}	718	}
782		719
783	void	720	void
784	aio_stat(fh_or_path,callback=&PL_sv_undef)	721	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
785	SV * fh_or_path
786	SV * callback
787	ALIAS:	722	ALIAS:
788	aio_stat = REQ_STAT	723	aio_stat = EIO_STAT
789	aio_lstat = REQ_LSTAT	724	aio_lstat = EIO_LSTAT
790	CODE:	725	PPCODE:
791	{	726	{
792	dREQ;	727	dREQ;
793		728
794	New (0, req->statdata, 1, Stat_t);	729	req->sv1 = newSVsv (fh_or_path);
795	if (!req->statdata)
796	{
797	free_req (req);
798	croak ("out of memory during aio_req->statdata allocation");
799	}
800		730
801	if (SvPOK (fh_or_path))	731	if (SvPOK (req->sv1))
802	{	732	{
803	req->type = ix;	733	req->type = ix;
804	req->data = newSVsv (fh_or_path);
805	req->dataptr = SvPVbyte_nolen (req->data);	734	req->ptr1 = SvPVbyte_nolen (req->sv1);
806	}	735	}
807	else	736	else
808	{	737	{
809	req->type = REQ_FSTAT;	738	req->type = EIO_FSTAT;
810	req->fh = newSVsv (fh_or_path);
811	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	739	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		740	}
		741
		742	REQ_SEND;
		743	}
		744
		745	void
		746	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		747	PPCODE:
		748	{
		749	dREQ;
		750
		751	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		752	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		753	req->sv1 = newSVsv (fh_or_path);
		754
		755	if (SvPOK (req->sv1))
812	}	756	{
		757	req->type = EIO_UTIME;
		758	req->ptr1 = SvPVbyte_nolen (req->sv1);
		759	}
		760	else
		761	{
		762	req->type = EIO_FUTIME;
		763	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		764	}
813		765
814	send_req (req);	766	REQ_SEND;
815	}	767	}
816		768
817	void	769	void
		770	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		771	PPCODE:
		772	{
		773	dREQ;
		774
		775	req->sv1 = newSVsv (fh_or_path);
		776	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		777
		778	if (SvPOK (req->sv1))
		779	{
		780	req->type = EIO_TRUNCATE;
		781	req->ptr1 = SvPVbyte_nolen (req->sv1);
		782	}
		783	else
		784	{
		785	req->type = EIO_FTRUNCATE;
		786	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		787	}
		788
		789	REQ_SEND;
		790	}
		791
		792	void
		793	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		794	ALIAS:
		795	aio_chmod = EIO_CHMOD
		796	aio_mkdir = EIO_MKDIR
		797	PPCODE:
		798	{
		799	dREQ;
		800
		801	req->int2 = mode;
		802	req->sv1 = newSVsv (fh_or_path);
		803
		804	if (SvPOK (req->sv1))
		805	{
		806	req->type = ix;
		807	req->ptr1 = SvPVbyte_nolen (req->sv1);
		808	}
		809	else
		810	{
		811	req->type = EIO_FCHMOD;
		812	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		813	}
		814
		815	REQ_SEND;
		816	}
		817
		818	void
		819	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		820	PPCODE:
		821	{
		822	dREQ;
		823
		824	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		825	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		826	req->sv1 = newSVsv (fh_or_path);
		827
		828	if (SvPOK (req->sv1))
		829	{
		830	req->type = EIO_CHOWN;
		831	req->ptr1 = SvPVbyte_nolen (req->sv1);
		832	}
		833	else
		834	{
		835	req->type = EIO_FCHOWN;
		836	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		837	}
		838
		839	REQ_SEND;
		840	}
		841
		842	void
818	aio_unlink(pathname,callback=&PL_sv_undef)	843	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
819	SV * pathname
820	SV * callback
821	ALIAS:	844	ALIAS:
822	aio_unlink = REQ_UNLINK	845	aio_unlink = EIO_UNLINK
823	aio_rmdir = REQ_RMDIR	846	aio_rmdir = EIO_RMDIR
		847	aio_readdir = EIO_READDIR
824	CODE:	848	PPCODE:
825	{	849	{
826	dREQ;	850	dREQ;
827		851
828	req->type = ix;	852	req->type = ix;
829	req->data = newSVsv (pathname);	853	req->sv1 = newSVsv (pathname);
830	req->dataptr = SvPVbyte_nolen (req->data);	854	req->ptr1 = SvPVbyte_nolen (req->sv1);
		855
		856	REQ_SEND;
		857	}
		858
		859	void
		860	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		861	ALIAS:
		862	aio_link = EIO_LINK
		863	aio_symlink = EIO_SYMLINK
		864	aio_rename = EIO_RENAME
		865	PPCODE:
		866	{
		867	dREQ;
831		868
832	send_req (req);	869	req->type = ix;
833	}	870	req->sv1 = newSVsv (oldpath);
834		871	req->ptr1 = SvPVbyte_nolen (req->sv1);
835	void	872	req->sv2 = newSVsv (newpath);
836	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	873	req->ptr2 = SvPVbyte_nolen (req->sv2);
837	SV * oldpath
838	SV * newpath
839	SV * callback
840	CODE:
841	{
842	dREQ;
843		874
844	req->type = REQ_SYMLINK;	875	REQ_SEND;
845	req->fh = newSVsv (oldpath);	876	}
846	req->data2ptr = SvPVbyte_nolen (req->fh);	877
847	req->data = newSVsv (newpath);	878	void
848	req->dataptr = SvPVbyte_nolen (req->data);	879	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		880	PPCODE:
		881	{
		882	dREQ;
849		883
850	send_req (req);	884	req->type = EIO_MKNOD;
		885	req->sv1 = newSVsv (pathname);
		886	req->ptr1 = SvPVbyte_nolen (req->sv1);
		887	req->int2 = (mode_t)mode;
		888	req->offs = dev;
		889
		890	REQ_SEND;
851	}	891	}
852		892
853	void	893	void
		894	aio_busy (double delay, SV *callback=&PL_sv_undef)
		895	PPCODE:
		896	{
		897	dREQ;
		898
		899	req->type = EIO_BUSY;
		900	req->nv1 = delay < 0. ? 0. : delay;
		901
		902	REQ_SEND;
		903	}
		904
		905	void
		906	aio_group (SV *callback=&PL_sv_undef)
		907	PROTOTYPE: ;$
		908	PPCODE:
		909	{
		910	dREQ;
		911
		912	req->type = EIO_GROUP;
		913
		914	req_submit (req);
		915	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		916	}
		917
		918	void
		919	aio_nop (SV *callback=&PL_sv_undef)
		920	ALIAS:
		921	aio_nop = EIO_NOP
		922	aio_sync = EIO_SYNC
		923	PPCODE:
		924	{
		925	dREQ;
		926
		927	req->type = ix;
		928
		929	REQ_SEND;
		930	}
		931
		932	int
		933	aioreq_pri (int pri = 0)
		934	PROTOTYPE: ;$
		935	CODE:
		936	RETVAL = next_pri;
		937	if (items > 0)
		938	{
		939	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		940	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		941	next_pri = pri;
		942	}
		943	OUTPUT:
		944	RETVAL
		945
		946	void
		947	aioreq_nice (int nice = 0)
		948	CODE:
		949	nice = next_pri - nice;
		950	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		951	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		952	next_pri = nice;
		953
		954	void
854	flush()	955	flush ()
855	PROTOTYPE:	956	PROTOTYPE:
856	CODE:	957	CODE:
857	while (nreqs)	958	while (eio_nreqs ())
858	{	959	{
859	poll_wait ();	960	poll_wait ();
860	poll_cb ();	961	poll_cb ();
861	}	962	}
862		963
863	void	964	int
864	poll()	965	poll()
865	PROTOTYPE:	966	PROTOTYPE:
866	CODE:	967	CODE:
867	if (nreqs)
868	{
869	poll_wait ();	968	poll_wait ();
870	poll_cb ();	969	RETVAL = poll_cb ();
871	}	970	OUTPUT:
		971	RETVAL
872		972
873	int	973	int
874	poll_fileno()	974	poll_fileno()
875	PROTOTYPE:	975	PROTOTYPE:
876	CODE:	976	CODE:
…		…
888		988
889	void	989	void
890	poll_wait()	990	poll_wait()
891	PROTOTYPE:	991	PROTOTYPE:
892	CODE:	992	CODE:
893	if (nreqs)
894	poll_wait ();	993	poll_wait ();
895		994
896	int	995	int
897	nreqs()	996	nreqs()
898	PROTOTYPE:	997	PROTOTYPE:
899	CODE:	998	CODE:
900	RETVAL = nreqs;	999	RETVAL = eio_nreqs ();
901	OUTPUT:	1000	OUTPUT:
902	RETVAL	1001	RETVAL
903		1002
		1003	int
		1004	nready()
		1005	PROTOTYPE:
		1006	CODE:
		1007	RETVAL = eio_nready ();
		1008	OUTPUT:
		1009	RETVAL
		1010
		1011	int
		1012	npending()
		1013	PROTOTYPE:
		1014	CODE:
		1015	RETVAL = eio_npending ();
		1016	OUTPUT:
		1017	RETVAL
		1018
		1019	int
		1020	nthreads()
		1021	PROTOTYPE:
		1022	CODE:
		1023	RETVAL = eio_nthreads ();
		1024	OUTPUT:
		1025	RETVAL
		1026
		1027	void _on_next_submit (SV *cb)
		1028	CODE:
		1029	SvREFCNT_dec (on_next_submit);
		1030	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1031
		1032	PROTOTYPES: DISABLE
		1033
		1034	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1035
		1036	void
		1037	cancel (aio_req_ornot req)
		1038	CODE:
		1039	eio_cancel (req);
		1040
		1041	void
		1042	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1043	CODE:
		1044	SvREFCNT_dec (req->callback);
		1045	req->callback = newSVsv (callback);
		1046
		1047	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1048
		1049	void
		1050	add (aio_req grp, ...)
		1051	PPCODE:
		1052	{
		1053	int i;
		1054
		1055	if (grp->int1 == 2)
		1056	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1057
		1058	for (i = 1; i < items; ++i )
		1059	{
		1060	aio_req req;
		1061
		1062	if (GIMME_V != G_VOID)
		1063	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1064
		1065	req = SvAIO_REQ (ST (i));
		1066
		1067	if (req)
		1068	eio_grp_add (grp, req);
		1069	}
		1070	}
		1071
		1072	void
		1073	cancel_subs (aio_req_ornot req)
		1074	CODE:
		1075	req_cancel_subs (req);
		1076
		1077	void
		1078	result (aio_req grp, ...)
		1079	CODE:
		1080	{
		1081	int i;
		1082	AV *av;
		1083
		1084	grp->errorno = errno;
		1085
		1086	av = newAV ();
		1087
		1088	for (i = 1; i < items; ++i )
		1089	av_push (av, newSVsv (ST (i)));
		1090
		1091	SvREFCNT_dec (grp->sv1);
		1092	grp->sv1 = (SV *)av;
		1093	}
		1094
		1095	void
		1096	errno (aio_req grp, int errorno = errno)
		1097	CODE:
		1098	grp->errorno = errorno;
		1099
		1100	void
		1101	limit (aio_req grp, int limit)
		1102	CODE:
		1103	eio_grp_limit (grp, limit);
		1104
		1105	void
		1106	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1107	CODE:
		1108	{
		1109	SvREFCNT_dec (grp->sv2);
		1110	grp->sv2 = newSVsv (callback);
		1111
		1112	if (grp->int2 <= 0)
		1113	grp->int2 = 2;
		1114
		1115	eio_grp_limit (grp, grp->int2);
		1116	}
		1117

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